Exemptions

98. Ethyl alcohol (ethanol) production
facilities having a capacity of less than 200 gallons of ethanol
per day when natural gas, liquid petroleum gas, or Number 2 fuel
oil is used to supply heat for cooking and distillation and when
the spent (distillers) grain and water stillage are not dried.

99. Any asphalt concrete facility that
complies with Federal Regulation 40 Code of Federal Regulations
Part 60, Subparts A and I and operates according to the following
conditions:

(a) A New Source Performance Standard
pretest meeting concerning the required stack sampling shall be
held with personnel of the Texas Air Control Board (TACB) before
the required tests are performed. Air contaminants to be tested for
will be determined at the pretest meeting. Stack sampling
requirements will not be required by the Executive Director,
provided that:

(1) The applicant submits adequate documentation (including
copies of previous test results of the model hot mix plant
proposed, including a description of the aggregate materials used
in previous tests) demonstrating compliance with the 0.04 grain per
dry standard cubic feet allowable.

(2) Visible emissions from the exhaust stack are documented at
5.0% or less opacity averaged over six consecutive minutes.

(b) Fuel for dryers shall be sweet
natural gas as defined in General Rules as adopted by the TACB or
liquid petroleum gas, diesel, or fuel oil with a maximum sulfur
content of 1.5%.

(c) All aggregate stockpiles shall be
sprinkled with water and/or chemicals as necessary to achieve
maximum control of dust emissions.

(d) All permanent in-plant roads
shall be watered, oiled, or paved and cleaned as necessary to
achieve maximum control of dust emissions.

(e) The plant is located at least 1/2
mile from any recreational area or residence or other structure not
occupied or used solely by the owner of the facility or the owner
of the property upon which the facility is located.

(f) Before construction of the
facility begins, written site approval shall be received from the
Executive Director of the TACB and the facility shall be registered
with Form PI-7, including a current Table 22.

100. Metering, purging, and
maintenance operations for gaseous and liquid petroleum pipelines
(including ethylene, propylene, butylene, and butadiene pipelines)
provided that operations are conducted according to the following
conditions:

(a) All emissions, except fugitive
emissions, are burned in a smokeless flare; or

(b) Total emissions of any air
contaminant will not exceed one ton during any metering, purging,
or maintenance operation.

101. Any air separation, or other
industrial gas production, storage, or packaging facility.
Industrial gases, for purposes of this exemption, include only
oxygen, nitrogen, helium, neon, argon, krypton, and xenon.

102. Any abrasive cleaning operation
that will satisfy condition (a) or (b):

(a) Enclosed abrasive cleaning:

(1) The particulate matter emissions are evacuated through a
fabric filter with a maximum filtering velocity of 4.0 feet per
minute (ft/min) with mechanical cleaning or 7.0 ft/min with air
cleaning; and

(2) There are no visible fugitive emissions from the
facility.

(b) Outside blast cleaning:

(1) Abrasive usage rate shall not exceed 150 tons per year, 15
tons per month, and one ton per day; and

(2) The blast cleaning is performed at least 500 feet from any
recreational area or residence or other structure not occupied or
used solely by the owner of the facility or the owner of the
property upon which the facility is located; and

(3) Records shall be maintained of operating hours and abrasive
material usage; and

(4) Before construction begins the facility is registered with
the appropriate Regional Office using Form PI-7; and

(5) Before construction of the facility begins, written site
approval shall be received from the Executive Director of the Texas
Air Control Board.

103. Refrigeration systems, including
storage tanks used in refrigeration systems.

(1) a fabric or cartridge filter with air cleaning and a
filtering velocity no greater than 7.0 feet per minute (ft/min), or
automatic sequenced mechanical cleaning and a filtering velocity no
greater than 5.0 ft/min. The filter unit may vent back into the
process building or to the atmosphere.

or

(2) a fabric or cartridge filter (may be preceded by a cyclone
collector) which vents back into the process building when the
doors and windows remain closed during plant operations except for
persons entering and leaving the building.

(b) Commercial woodworking shops in
which the disposal of collected material is accomplished in a
manner which will prevent the material from becoming airborne, and
there are no visible fugitive emissions from the facility.

(c) Woodworking shops used solely for
instructional purposes at public, private, and vocational schools
in which the dust collection, storage and disposal system(s)
prevents dust emissions from creating a nuisance condition.

106. Facilities, or physical or
operational changes to a facility, provided that all of the
following conditions are satisfied:

(a) This exemption shall not be used
to authorize construction of or any change to a facility authorized
in another standard exemption (See Exemption 118(a)).

(b) The facilities or changes shall
be located at least 100 feet from any recreational area or
residence or other structure not occupied or used solely by the
owner or operator of the facilities or the owner of the property
upon which the facilities are located.

(d) Total new or increased emissions,
including fugitives, shall not exceed 1.0 lb/hr of any chemical
having a limit value (L) greater than 200 milligrams per cubic
meter (mg/m3) as listed and referenced in Table 118A of the
Standard Exemption List or of any other chemical not listed or
referenced in Table 118A. Emissions of a chemical with a limit
value of less than 200 mg/m3 are not allowed under this
exemption.

(e) For physical changes or
modifications to existing facilities, there shall be no changes to
or additions of any air pollution abatement equipment.

(f) Visible emissions, except
uncombined water, to the atmosphere from any point or fugitive
source shall not exceed 5.0% opacity in any five-minute
period.

(1) The unit shall be equipped with a cover that can be opened
and closed easily without disturbing the vapor zone.

(2) The surface area of the solvent shall not exceed 15 square
feet.

(3) The cover shall be closed at all times except when
processing work into and out of the degreaser.

(4) The unit shall be equipped with a properly sized
refrigerated chiller, or the unit shall have a freeboard ratio (the
distance from top of the vapor level to the top edge of the
degreasing tank divided by the degreaser width) equal to or greater
than 0.75.

(7) The unit shall be registered with the appropriate Regional
Office using Form PI-7.

(b) Cold solvent cleaners:

(1) The unit shall be registered with Form PI-7; however,
registration is not required if total solvents makeup (gross
purchased minus waste disposal) is 110 gallons per year or
less.

(2) The unit shall be equipped with a cover which is closed
whenever parts are not being handled in the cleaner. This does not
apply to "remote reservoir" type cleaners.

(3) A cleaned-parts drainage rack or facility shall be
provided. Parts shall be drained for at least 15 seconds or until
dripping ceases.

(4) If a solvent spray is used, it shall be a solid fluid
stream (not a fine, atomized or shower-type spray) and at a
pressure which will not cause excessive splashing.

(5) Waste solvent shall be stored in covered containers.

(6) The requirements of Regulation V, 115.172 shall be
satisfied.

(c) Conveyorized degreasers:

(1) The cover shall be closed at all times except when
processing work into and out of the degreaser.

(2) The unit shall be equipped with a properly sized
refrigerated chiller, or the unit shall have a freeboard ratio (the
distance from top of the vapor level to the top edge of the
degreasing tank divided by the degreaser width) equal to or greater
than 0.75.